Change super transformation to freeze momentum instead of bitshifting

Fixes https://mb.srb2.org/showthread.php?t=39921 where the issue before was that when you transformed your momentum would still have you moving slowly, which could cancel out the animation.
Merge remote-tracking branch 'upstream/master'
Fix the polyobject crash
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'Sryder13/master'
Merge branch 'master' into next
Merge remote-tracking branch 'wolfy852/patch-2' into next